- move encode_contact, decode_contact and decode_contact_header function

  from mangler to siputils, delete remaining mangler module
- credits belongs to Frederick Bullik, frederick dot bullik at 1und1 dot de
- remove almost empty common.h file, remove module from test 2


git-svn-id: https://openser.svn.sourceforge.net/svnroot/openser/trunk@5318 689a6050-402a-0410-94f2-e92a70836424

test/unit/2.cfg

@@ -21,7 +21,6 @@ loadmodule "group/group.so"
 loadmodule "htable/htable.so"
 loadmodule "imc/imc.so"
 loadmodule "lcr/lcr.so"
-loadmodule "mangler/mangler.so"
 loadmodule "maxfwd/maxfwd.so"
 loadmodule "mi_datagram/mi_datagram.so"
 loadmodule "mi_fifo/mi_fifo.so"